dedecms 微信接口

<?php
// 验证签名
function checkSignature($token, $signature, $timestamp, $nonce) {
    $tmpArr = array($token, $timestamp, $nonce);
    sort($tmpArr, SORT_STRING);
    $tmpStr = implode($tmpArr);
    $tmpStr = sha1($tmpStr);
    if ($tmpStr == $signature) {
        return true;
    } else {
        return false;
    }
}

// 处理微信请求
if (!empty($_GET["echostr"])) {
    $token = "your_token";
    $signature = $_GET["signature"];
    $timestamp = $_GET["timestamp"];
    $nonce = $_GET["nonce"];
    if (checkSignature($token, $signature, $timestamp, $nonce)) {
        echo $_GET["echostr"];
        exit;
    }
} else {
    // 处理微信消息
    $postStr = file_get_contents("php://input");
    if (!empty($postStr)) {
        libxml_disable_entity_loader(true);
        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
        $fromUsername = $postObj->FromUserName;
        $toUsername = $postObj->ToUserName;
        $keyword = trim($postObj->Content);
        $time = time();
        $textTpl = "<xml>
                        <ToUserName><![CDATA[%s]]></ToUserName>
                        <FromUserName><![CDATA[%s]]></FromUserName>
                        <CreateTime>%s</CreateTime>
                        <MsgType><![CDATA[text]]></MsgType>
                        <Content><![CDATA[%s]]></Content>
                    </xml>";
        if (!empty($keyword)) {
            $msgType = "text";
            $contentStr = "Welcome to wechat!";
            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $contentStr);
            echo $resultStr;
        } else {
            echo "Input something...";
        }
    } else {
        echo "";
        exit;
    }
}
?>